Aliexpress
Click here… to search for iFlight Chimera4 LR Micro 4S Drone BNF-DJI on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (289.79 USD): BGDAVIS
Coupon (292.94 USD): BGMATT7
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BgoFErTaSchInA10, bGhOnEy10, BGHALLOWEEN, BG10LRCMR4, BGIFLR4, BgcLuBofErtA10, BG11GALLR, BG11CM4LR, BGBFIFLR, BGBFCM4LR, BG11Racer, BGCLIFLR, BG10RACING, BGCuponation10, BG9MCH
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for iFlight Chimera4 LR Micro 4S Drone BNF-DJI.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).